What Caused the Widespread Disruption?
The chaos began on Tuesday, September 8, 2026, due to a technical failure in the flight processing system of National Air Traffic Services (NATS), the UK's main air traffic control provider. This was not a cyberattack, but a technical fault that severely
limited the system's ability to manage flight plans automatically. While the initial problem was fixed within hours, the knock-on effects have been severe, leading to two days of significant disruption with over 2,000 flights cancelled or heavily delayed across the country. The incident has been described as one of the most significant of its kind for NATS in recent years.
Is the Situation Back to Normal?
Flight schedules are beginning to stabilise, with a return to normal operations expected soon. However, the disruption from earlier in the week continues to have a ripple effect. Airlines are still working to reposition aircraft and crews that were left stranded in the wrong locations, which can cause further delays and cancellations. On Wednesday, September 9, hundreds of additional flights were cancelled, primarily at London Heathrow. Although cancellations are now slowing, passengers are still advised to expect some ongoing issues as the system fully recovers. In a separate issue, workers at Gatwick Airport have announced strike action over pay for later in September, which could cause further disruption for travellers using that airport.
Impact on Flights to and from India
The disruption directly impacted services between the UK and India. Major carriers including Air India, IndiGo, and British Airways were all affected. Several London-bound flights from Indian cities like Delhi, Mumbai, and Bengaluru had to be diverted to other European airports such as Paris, Amsterdam, and Zurich on Tuesday. Consequently, the return legs of these flights to India were cancelled on Wednesday. Both Air India and IndiGo have issued statements confirming the impact and urging passengers to check their flight status before heading to the airport.
Advice for Affected Travellers
If you are scheduled to travel to or from the UK, the most important step is to check the status of your flight directly with your airline before you go to the airport. Do not rely on original schedules. Airlines are responsible for providing assistance if your flight is significantly delayed or cancelled. This includes providing reasonable food and drink, access to communication, and, if necessary, overnight accommodation. If your flight is cancelled, you are generally entitled to a choice between a full refund or being rebooked on an alternative flight. Given the extraordinary circumstances, the UK's Civil Aviation Authority has stated that compensation is unlikely for issues directly caused by the NATS system failure. However, you should still keep receipts for any reasonable expenses you incur, as you may be able to claim these back from your airline.
